Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions
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2017
Authors
Gómez-Villalba, Luz Stella
Sierra-Fernández, Aránzazu

Milošević, Olivera

Fort, R.
Rabanal, Maria Eugenia

Article (Published version)

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Micro and nanostructured brucite (Mg(OH2)) particles synthesized by hydrothermal method from solutions with high content of hydrazine (0.14 M) and nitrate (0.24 g) were compared with samples obtained from low hydrazine content (0.0002 M) and nitrate (0.12 g). The samples were heated at 180 °C for 4 h, 6 h and 12 h. XRD, TEM-HRTEM, SAED and image analysis techniques were used for the morphological and structural characterization. The effect of electron beam irradiation on the brucite dehydration was observed in atomic resolution images at 300 kV. Hexagonal crystals show differences in crystallinity, strains and kinetic of reaction. High hydrazine/nitrate samples have slightly larger crystals with better crystallinity, showing a strong preferential orientation. Rietveld refinements show how unit cell parameters are bigger in samples obtained with higher hydrazine/nitrate content, confirming also the preferential orientation along the 0 0 0 1 plane. Differences in the dehydration process ...show the rapid formation of a porous surface, the amorphised cortex or the presence of highly oriented strains in samples prepared from higher hydrazine/nitrate content. Conversely, crystals slightly smaller with randomly scattered defect surfaces showing the Mg(OH)2/MgO interphase in samples prepared with low hydrazine/nitrate content. Significant differences in the kinetic of reaction indicate how the dehydration process is faster in samples prepared with high hydrazine/nitrate content.
Keywords:
Brucite / Periclase / Hydrothermal synthesis / TEM-HRTEM-XRDSource:
Advanced Powder Technology, 2017, 28, 1, 61-72Publisher:
- Elsevier
Funding / projects:
- Rational design and synthesis of biologically active and coordination compounds and functional materials, relevant for (bio)nanotechnology (RS-172035)
- Community of Madrid, Spain, Project GEOMATERIALES II (S2013/MIT-2914)
- Autonomous Region Program of Madrid, Spain, MULTIMAT-CHALLENGE (ref. S2013/MIT-2862)
- Innovation and Education Ministry, Spain, Project MAT2013-47460-C5-5-P
- Interministerial Commission for Science and Technology (CICYT), Spain, Project MAT2010-19837-C06-05
DOI: 10.1016/j.apt.2016.08.014
ISSN: 0921-8831
WoS: 000395355100009
Scopus: 2-s2.0-84994705274
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Gómez-Villalba, Luz Stella AU - Sierra-Fernández, Aránzazu AU - Milošević, Olivera AU - Fort, R. AU - Rabanal, Maria Eugenia PY - 2017 UR - https://dais.sanu.ac.rs/123456789/15970 AB - Micro and nanostructured brucite (Mg(OH2)) particles synthesized by hydrothermal method from solutions with high content of hydrazine (0.14 M) and nitrate (0.24 g) were compared with samples obtained from low hydrazine content (0.0002 M) and nitrate (0.12 g). The samples were heated at 180 °C for 4 h, 6 h and 12 h. XRD, TEM-HRTEM, SAED and image analysis techniques were used for the morphological and structural characterization. The effect of electron beam irradiation on the brucite dehydration was observed in atomic resolution images at 300 kV. Hexagonal crystals show differences in crystallinity, strains and kinetic of reaction. High hydrazine/nitrate samples have slightly larger crystals with better crystallinity, showing a strong preferential orientation. Rietveld refinements show how unit cell parameters are bigger in samples obtained with higher hydrazine/nitrate content, confirming also the preferential orientation along the 0 0 0 1 plane. Differences in the dehydration process show the rapid formation of a porous surface, the amorphised cortex or the presence of highly oriented strains in samples prepared from higher hydrazine/nitrate content. Conversely, crystals slightly smaller with randomly scattered defect surfaces showing the Mg(OH)2/MgO interphase in samples prepared with low hydrazine/nitrate content. Significant differences in the kinetic of reaction indicate how the dehydration process is faster in samples prepared with high hydrazine/nitrate content. PB - Elsevier T2 - Advanced Powder Technology T1 - Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions SP - 61 EP - 72 VL - 28 IS - 1 DO - 10.1016/j.apt.2016.08.014 UR - https://hdl.handle.net/21.15107/rcub_dais_15970 ER -
@article{ author = "Gómez-Villalba, Luz Stella and Sierra-Fernández, Aránzazu and Milošević, Olivera and Fort, R. and Rabanal, Maria Eugenia", year = "2017", abstract = "Micro and nanostructured brucite (Mg(OH2)) particles synthesized by hydrothermal method from solutions with high content of hydrazine (0.14 M) and nitrate (0.24 g) were compared with samples obtained from low hydrazine content (0.0002 M) and nitrate (0.12 g). The samples were heated at 180 °C for 4 h, 6 h and 12 h. XRD, TEM-HRTEM, SAED and image analysis techniques were used for the morphological and structural characterization. The effect of electron beam irradiation on the brucite dehydration was observed in atomic resolution images at 300 kV. Hexagonal crystals show differences in crystallinity, strains and kinetic of reaction. High hydrazine/nitrate samples have slightly larger crystals with better crystallinity, showing a strong preferential orientation. Rietveld refinements show how unit cell parameters are bigger in samples obtained with higher hydrazine/nitrate content, confirming also the preferential orientation along the 0 0 0 1 plane. Differences in the dehydration process show the rapid formation of a porous surface, the amorphised cortex or the presence of highly oriented strains in samples prepared from higher hydrazine/nitrate content. Conversely, crystals slightly smaller with randomly scattered defect surfaces showing the Mg(OH)2/MgO interphase in samples prepared with low hydrazine/nitrate content. Significant differences in the kinetic of reaction indicate how the dehydration process is faster in samples prepared with high hydrazine/nitrate content.", publisher = "Elsevier", journal = "Advanced Powder Technology", title = "Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions", pages = "61-72", volume = "28", number = "1", doi = "10.1016/j.apt.2016.08.014", url = "https://hdl.handle.net/21.15107/rcub_dais_15970" }
Gómez-Villalba, L. S., Sierra-Fernández, A., Milošević, O., Fort, R.,& Rabanal, M. E.. (2017). Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions. in Advanced Powder Technology Elsevier., 28(1), 61-72. https://doi.org/10.1016/j.apt.2016.08.014 https://hdl.handle.net/21.15107/rcub_dais_15970
Gómez-Villalba LS, Sierra-Fernández A, Milošević O, Fort R, Rabanal ME. Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions. in Advanced Powder Technology. 2017;28(1):61-72. doi:10.1016/j.apt.2016.08.014 https://hdl.handle.net/21.15107/rcub_dais_15970 .
Gómez-Villalba, Luz Stella, Sierra-Fernández, Aránzazu, Milošević, Olivera, Fort, R., Rabanal, Maria Eugenia, "Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions" in Advanced Powder Technology, 28, no. 1 (2017):61-72, https://doi.org/10.1016/j.apt.2016.08.014 ., https://hdl.handle.net/21.15107/rcub_dais_15970 .